Description

i have a Debian 5.0 AMD64 host system with a 64Bit CPU
when i try to run/install/start a new VM and boot from an
install DVD of CentOS 5.2 64Bit i get the following error:
"your cpu does not support long mode"

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Please attach your VBox.log file. Most probably your CPU does either not support VT-x or AMD-V or this feature was not properly enabled by your BIOS. Note that we support 64-bit guests only with VT-x/AMD-V enabled hosts (this is mentioned in the user manual).

I fear not. The reason is that the number of CPUs without VT-x or AMD-V is constantly decreasing, most new PCs have support for virtualization built-in. Adding a non VT-x/AMD-V mode for 64-bit guests would be a big effort we don't want to pay.